Grate



F. m bsoRLEY ET AL July 13 1926.

Filed Feb. 4, 1925 :n-iI Q i- III in E- mw Q My W M ff/fww BY Ham r p ad ATT R Patented July 13, 1926.

UNITED STATES PATENT OFFICE.

FRANK L. MACSORLEY AND WILLIAM V7. :MIACSORLEY, OF NEW YORK, N. Y.

GRATE.

Application filed February 4, 1925.

This invention is a grate adapted for use in stoves and furnaces and the object of the invention is to provide a highly efficientgrate construction aoapted to be built up 6 from a large number of units all of which are substantially the same.

In its preferred practical form, the invention embodies a grate bar preferably of wrought iron and of polygonal cross section. A square bar may be used to advantage. On this bar is adapted to be assembled a plurality of grate units, each of which is in the form of a substantially circular disc, the periphery of which is fluted so as to form the disc with peripheral teeth. The discs are relatively thin and are provided at their centers With holes adapted to fit the grate bar whereby they are adapted to be positioned on the bar in sequence. Each unit is moreover provided with spacing lugs, the purpose of which is to space the units apart to present to the fire a succession of arcuate fluted surfaces with intermediate draught spaces. lVith each bar is adapted to be associated at least one unit provided with an extending arm adapted to be pivotally connected to the shaker link to which the other bars of the furnace or stove are also connected and with the link is associated appropriate means for moving the link longitudinally for the purpose of oscillating the units which are pivoted to said link. The oscillation of said units serves to oscillate the grate bars and all other units mounted thereon.

lVith the terminal units of each grate bar cam surfaces are formed integral and on the furnace are formed projections with which these cam surfaces are adapted to cooperate to the end that when the grate bars are oscillated, the cam surface will coact with the projections to effect longitudinal movement of the units on each bar first in the one direction and then in the other, so that the grate units are not only oscillated. back and forth, but are simultaneously longitudinally shifted for the purpose of effecting efficient breaking up of clinker and free ing the fire from ash.

A pronounced advantage inherent in this construction is the ease of initial assembly and also'the ability to make repairs in a simple, economical and expeditious manner through the replacement of such units as may be broken and without necessitating an Serial No. 6,700.

entire new grate construction when any particular element becomes broken.

Features of the invention, other than those specified, will be apparent from the hereinafter detailed description and claims, when read in conjunction with the accompanying drawings.

The accompanying drawings illustrate one practical embodiment of the invention, but the construction therein shown is to be understood as illustrative, only, and not as defining the limits of the invention.

Figure 1 is a perspective fragmental view showing a portion of one grate bar with one shaker unit thereon and a part of the grate bar support which sustains the weight of one end of each grate bar.

Figure 2 is a fragmental section taken on the line 22 of Figure l.

Figure 3 is a fragmental plan of so much of the construction as is shown in Figure 1;

Figure 4 is a side elevation of an as sembled grate.

Referring to the drawings, 1 designates a grate bar shown as square. This bar may be supported for oscillation on its longitudinal axis in any suitable manner, but for the purpose of illustration, I have shown it as supported at its opposite ends by a front supporting bar 2 and a rear supporting bar The bar 1 has a fixed trunnion l at its rear end which extends through a circular hole in the bar 3 and at its front end a trim nion 5 is screwed into a tapped hole in the corresponding end of the grate bar and extends through a circular hole in the front supporting bar 2. This arrangement expedites assembly and permits of slight adjustment to compensate for variations in various sizes of firepot.

On the bar 1 is adapted to be mounted a plurality of grate units. These units are of substantially the same configuration and are in the form of a plurality of discs. Of these discs the majority are the same, those designated 6 being identical with one another and in the form of circular discs having fluted peripheries and integrally formed spacing lugs 7 extending from one face thereof. The disc 6 is a combined terminal and shaking disc and varies from the discs 6 in that it is provided on its rear face with two cam surfaces 8 adapted to cooperate with projection 9 mounted on the rear supporting bar 3 or in any other suitable fixed position. The disc 6 is further provided with an integral depending shaker arm 10.

The front disc 6" is of substantially the same construction the disc 6 except that the spacing lugs are omit-ted and in lieu thereof two cam members 11 are formed on the forward face of this disc and are adapted for cooperation with projections 12 corresponding'in function to the projections 9 and supported on the front supporting bar 2 or in any other suitable finer position.

In making the assembly the units are grouped on the grate bar as shown so as to extend for substantially the full length of the bar with the bar passing through the central holes 14 in each disc. It will be noted from Figure 2 that these holes are, generally, square but that in each flat side of'the square configuration a semi-circular cut out 15 is formed. The purpose of this configuration is to facilitate fitting on the bar and eliminating unnecessary cutting in the event that a slight alteration may he found necessary when placing the discs on the bar. The semi circular cut outs 15 minimize the filing to obtain the desired fit and greatly expedite the work when the discs are formed of rougii castings as they generally are in practice.

t will be noted from Figure at that when the parts are assembled on the bar and properly spaced'apart by the spacing lugs 7 that the cam members 11 on the unit 6" are placed at 90 degrees to the cam members 8 on the unit 6 and a sutlicient number of the units are placed on the bar, so that when the bar is oscillated in one direction, the cam members 1]. will bear against the projections 12 to force all of the units longitudinally of the grate bar in the direction of the projection 9. lVhen the bar is es 'cillated in the opposite direction. the cam members 8 will engage with the'projections 9 and force all the units in the opposite direction so that as the bar is oscillated the grate units will be simultaneously shifted hack and forth on the bar.

In a furnace installation, it is the practies to employ a number of grate bar assemblies such as are shown in Figure l and the stove shaking units 6 of the respective bars are then connected together by a shaking link 16 to which the arms 10 are pivotally secured. The arms 10 are perforated and studs 16, carried by the links, extend loosely through these perforations to permit of sufficient lost motion to insure freedom of moreinent of the parts. The link 16 is connected with a suitable shaker 1'7, to impart longitudinal movement to the link 16, and through this movement to effect oscillation of the respective grate bars and the units mounted thereon. v In such an assembly the cam numbers of the units 6 and 6 of adjacent bars are preferably set at 90 to one another so that as adjacent bars are oscillated, the'grate units on these bars will move in directions longitudinally of the respective bars so as to produce a pronounced grounding action on clinker which may have accumulated on the grate the studs 16 are long enough to allow of this movement. .By this operation the clinker will not only be broken up by longitudinal movement of the te units of adjacent grate bars in opposite directions, but at the same time there will. he a pronounced grounding action due to the oscillation of said units which in practice has been found to pulverize the clinker without appreciable power being required in the shaking operation. By spacing the elements apart on the respective grate'bars proper provision is made for the circulation of air through the grate to produce the desired draught ant such circulation of air will preclude overheating and col :equent warping of the grate units.

From a practical standpoint, the grate of this invention embodies many features of practical importance. In the first place, it will be apparent to those skilled in the art that the elements may be made in the form of rough castings and thus are produced very economically. Vihile the grate bars may be made from castings, they are in practice preferably made of a standard size wrought i on which enables them to be read ily drilled and tapped for the trunnions and also allows the standard stock material to he cut off at any desired length for particular grate installations thereby rendering it unnecessary to carry a large assortment of sizes in stock. ln making any installation, it is only necess y to out the grate bars to the nroper length and then assemble an appropriate numberof elements on the bars. This rcnders'thc assembly very simple and economical since skilled help is not required. In the event that the breakage occurs the particular bar effected may be readily rcmoved and the broken part replaced. For example, if one of the discs becomes broken, it may be replaced at the cost of a few cents in material and but little time in labor. This is an important consideration as it does not require tnat a furnace be shut down until an entire new casting can be obtained as isnow the case and thenparts of the furnace will not have to be dismantled to make the repair.

Having thus fully described the invention, what we claim as newand desire to secure by Letters Patent is:

1. Grate construction embodying a polygonal grate bar, a plurality of grate units, each of which is assembled on said bar and each of which is provided with (a polygonal opening interfitting wit-lithe bar, projections on each unit for spacing them consecutively apart, cam surfaces on the end units, cooperating fixed projections associated with the firebox, and means for oscillating the assembled grate bar and units to effect cooperation between the cam members and the fixed projections whereby oscillation of the assembly will effect a longitudinal shitting of the units on the bar.

2. Grate construction embodying parallel grate bars of polygonal cross section mounted in spaced relation for oscillation on fixed axes, a plurality of grate elements assembled on each bar and each of which elements is in the form of a disc having a fluted periphery and spacing projections to space the discs consecutively apart longitudinally of the respective grate bars, each disc being further provided at its center with a hole loosely fitting over the bar to lock the disc for oscillation with the bar but to permit longitudinal movement of the disc on the bar, at least one disc of each bar being provided with a radial projection and a linl: connecting the radial projections of said discs and through which link force may be applied to effect simultaneous shaking ot all of the bars and associated discs, in combination with cam members associated with the end discs of each bar and fixed projections mounted in the path of rotation of said members, whereby oscillation of the bars will effect cooperation between the cam members and the fixed projections and cause longitudinal movement of the grate units on the respective grate bars.

:3. A demountable grate unit embodying a substantially circular disc, the periphery of which is fluted and the center of which is provided with a polygonal hole adapted to lit a correspondingly shaped grate bar, and one face of the disc being provided with integral spacing projections, and the other face of the disc being provided with a cam like projection.

4:. A demountahle grate unit embodying a substantially circular disc, the circumference of which is fluted and one face or" which is provided with laterally extending integral spacing projections, said disc being pro-- vided at its center with a polygonal hole. the flat sides of which are cut away for a portion of their extent intermediate the angles of the hole to facilitate the fitting of the hole to a polygonal grate bar.

In testimony whereof we have signed the foregoing specification.

FRANK L. MAOSORLEY. lVILLIAM XV. MAGSORLEY. 

